winchell



(No Model.) 2 sheets sheet 1.

J. P. WING-HELL. GRINDING MILL.

No. 536,410. Patented Mar. 26, 1895.

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TTORNEYL (No Model.) 2 Sheets-Sheet 2.

J. P. WINCHELLf GRINDING MILL.

No. 536,410. Patented Mar. 26, 1895.

ZIWZI 7 a UNITED STATES PATENT OFFICE.

JAMES F. WINOHELL, or SPRINGFIELD, oHIo, ASSIGNOR TO THE FOOS MANUFACTURING COMPANY, or SAME PLACE.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 536,410, dated March 26,1895.

Applicationfiled Janua y 19, 1394. Renewed January 25, 1895. Serial No. 536,276- (No model.)

articles, such as corn for animal feed, bone dried or cooked animal products, such as liver, hearts, &c., roots, bark, &c., and other articles used in various productive arts.

The improvements have reference to certain features of organization and construction designed to render the machinery of the mill more perfect in its operation, more lasting and more easily and eifectively utilized; and these peculiarities will be fully described hereinafter and particularly pointed out in the claims.

In the accompanying drawings, on which.

like reference letters and numerals indicate corresponding parts, Figure 1, is a vertical sectional view through one of the bearings of the mill shaft with a portion of the shaft in elevation, and with my various improvements exemplified in their preferred form; Fig. 2, a similar sectional view of a portion of the adjusting mechanism for the shaft; Fig. 3, also a similar view of the bearing at the opposite end of the shaft, with a portion of the shaft in elevation; Fig. 4, a sectional view on the line a: a:

of Fig. 1; Fig. 5, a detail elevation of the dust obstructer; Fig. 6, a transverse vertical section of the shaft and bearing on the line y y of Fig. 1; and Fig. 7, a side elevation of a grinding mill of thetype to which my improvements are especially applicable.

The base of the mill is shown at 2, within the casing 3 of which, are the grinding heads,

each being mounted on a shaft 4 and carry-- of the shafts in the bearings.

signed to permit of universal adjustment, sometimes called universal motion. done, first, to facilitate adjusting the shafts so as to secure the tram of the grinding heads or plates and, secondly, to change the positions of the shafts as wear and strains get them out of alignment and destroy the tram of the grinders.

The letter A designates a part of the frame or fixed structure of the grinding mill, for the vertical shank B of the bearing yoke O. The pillar D, the bearing E and the eye-bolts F support and verticallyadj ust the yoke. The nuts on the bolts are manipulated for this purpose so that the bearing or box can be adjusted up and down.

The support A is divided by'a vertical incision at G and its parts drawn by bolts Hso that the shank can be clamped in adjusted positions.

At either end of the yoke C is a cap 0 which holds down the trunnions I of the bearingblock proper, designated J. Plates K, screwed or otherwise secured to the yoke and caps, are provided with adjusting screws L, which are used to adjust the bearing-block laterally to accommodate the proper position of the shaft. Lockor jam nuts serve to hold the adjusting screws L to set positions. A cap 0 fits upon the bearing block, and this cap and the bearing block itself carry boxes P of Babbitt metal or other suitable material.

The mechanism so far stated permits of four adjustments or movements of the shaft Q. The object of these four adjustments, as already intimated, is to accommodate the position and direction of the bearings to the position and direction of the shafts. It will be understood that difficulty always arises in This is getting thebearings of shafts which are to run hundred to eighteen hundred revolutions per minute) in such exact alignment with each other that there will be not the least binding Thus, if it is necessary to adjust the axis of the bearing laterally it is done by operating the adjusting screws L. If it is necessary to swing the bearing slightly sidewise, it is done by turning the shank B in "its support A. If it is necessary ICO gitudinal movement of the shaft Q, called the end-thrust, in the direction of the arrow, is resisted by the tension of these springs, while the distance between. the grinding heads or plates or the inward adjustment of the shaft is determined by the screw 2'.

Incidentally I will remark that practice shows that a plurality of springs of the kind shown, with the same expansive force as one stouter spring of the same kind, are, nevertheless, more flexible and capable of yielding or compressing to a greater degree than one such spring; hence my employment of a plu: rality of them. They yield readily when any foreign substances, such as a nail, a stone, or anything not adapted to be ground by the plates, get between them accidentally.

In Fig. 3, is illustrated one end of one section of the shaft Q as also the other sleeve a, the adjusting screw 1'', the cups Z 0', the antifriction balls q and plates m and p, a ring 7'', all of which are the same as in Fig. 1, except the screw 2".

Returning now to the matter of the nice adjustment by the skilled operator and the separation of the plates by the ordinary workman without affecting such adjustment, it will be understood that when the adjustment has been made through the screw 11, it becomes fixed, but that by taking hold of thearm f and releasing the catch g, a turn of the threaded sleeve e will bodily withdraw the screw 2' which movement of the screwz' is followed up by the shaft Q, yetwithout changing the relative position or adjustment of that screw and the shaft. Then when the armfis returned to the position shown and the'latch again engaged in the notch h, the screw dis returned to its adjusted position and the shaft likewise moved inward to the position it occupied before. Thus the skilled operator having made the desired adjustment for the quality or degree of reduction desired, the unskilled employ can separate the grinding plates or heads at will and reset the adjustment, yet without changing it.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a grinding mill, the combination with the shaft, its bearing having a cupped-out portion at the end, and a ring fitted on the shaft and within the cupped-out portion, the ring having wings or blades on its outer side and a spring on the shaft arranged to press against the said ring and hold it in place within the oupped-out portion, whereby it is made to closely hug the walls of the cuppedout portion without unduly binding therein so that it will freely rotate with the shaft, thus making a close joint and at the same time producing air currents.

2. In a grinding mill, the combination with the main shaft and the adjusting screw, of two interposed cups, one against the shaft and one against the screw, and one of them having a projecting central portion, an inner series of ballssupported thereby, a dividing ring outside of said balls and a series of balls on the outside of said ring, and a plate in each cup and between it and the balls.

3. In a grinding mill, the combination with the main shaft, of two adjusting devices that are interconnected, one of them to adjust the shaft inward, and one of them to adjust the other device outward, whereby the shaft may be adjusted to working position, and whereby both adjusting devices may be withdrawn without changing their relative position.

4:. In a grinding mill, the combination with the main shaft of two adjusting devices, one to adjust the shaft inward and being itself mounted within and interconnected with the other, and such other device to adjust the first named outward, but being itself unconnected with the shaft, whereby one of the devices may be adjusted inward to adjust the shaft without disturbing the other, and whereby the latter may be adjusted outward without disturbing the relation of the two adjusting devices to each other.

5. In a grinding mill, the combination with the main shaft, of a gland, a screw-threaded sleeve carried thereby, an arm to screw and unscrew the sleeve and having a device to set the sleeve when screwed back to the previously determined position, and the screw mounted within the sleeve and adapted to adjust the shaft inward, the movements of the screw being independent of the sleeve, but the movements of the sleeve carrying the screw with it.

6. Int. grinding mill, the combination with the main shaft, a bearing, a closed sleeve fixed to the bearing, a gland, a spring between the gland and the closed sleeve, another sleeve threaded into the gland, an arm carried by the latter sleeve, a latch carried by the arm and engaging with the gland, and a screw threaded into the latter sleeve, and a lock-nut on the said screw working against, the said sleeve.

7. In a grinding mill, the combination with the main shaft, a sleeve fixed to its bearing having an interior shoulder and a cap plate carried by the sleeve, of a gland within the sleeve and resting against said shoulder, and coiled springs between the gland and the end plate, and an adjustable device between the gland and the shaft.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES F. WINOHELL.

Witnesses:

OLIVER H. MILLER, LIDA L. WINoHELL.

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